1-(2-amino-2-deoxy-{62 -d-ribofuranosyl) pyrimidines and derivatives thereof

ABSTRACT

1-(2-Amino-2-deoxy- Beta -D-ribofuranosyl)pyrimidines and the corresponding 2-aminoacylamido and 2-dipeptidylamido compounds are useful in controlling metabolic processes.

United States Patent 91 Verheyden et al.

I-(Z-AMINO-Z-DEOXY-B-D- RIBOFURANOSYL) PYRIMIDINES AND DERIVATIVES THEREOF Inventors: Julien P. Verheyden; John G.

Moffatt, both of Los Altos, Calif.

Assignee: Syntei: Corporation, Republic of Panama Filed: Oct. 24, 1969 Appl. No.: 869,355

US. Cl 260/21l.5 R, 260/112.5, 260/999 Int. Cl C07d 51/52 Field of Search 260/21 1.5 R, 112.5

References Cited UNITED STATES PATENTS 11/1964 Dutcher et al. 260/211.5 R

[ Aug. 28, 1973 3,278,518 10/1966 Schramm et a1. 260/21 1.5 R 3,541,079 11/1970 Schramm et a1. 260/211.5 R

Primary Examiner-Lewis Gotts Assistant Examiner-Johnnie R. Brown Attorney-Evelyn K. Merker, Gerard A. Blaufarb and William B. Walker [57] ABSTRACT 1-( Z-Amino-2-deoxy-B-D-ribofuranosyl )pyrimidines and the corresponding Z-aminoacylamido and 2- dipeptidylamido compounds are useful in controlling metabolic processes.

18 Claims, No Drawings 1-( 2-AMINO-Z-DEOXY-B-D-RIBOFURANOSYL) PYRIMIDINES AND DERIVATIVES THEREOF This invention relates to l-(2-amino-2-deoxy-B-D- ribofuranosyl)pyrimidines and derivatives thereof.

Prior to this invention, 1-(2-amino-2-deoxy-B-D- ribofuranosyl)pyrimidines and derivatives thereof were unknown. 3-Amino-3'-deoxy purine and pyrimidine nucleosides were known, one such compound being the antibiotic puromycin. 2'-Amino-2'-deoxy adenosine was prepared by Wolfrom (J.O.C. 32, 1823) from 2'- amino-2'-deoxyribose derivatives as were some 2- amino-2'-deoxy glucopyranosyl nucleosides (J.O.C. 32, 2757). However, previous attempts to prepare 2- amino-2'-deoxy uridine by opening a 2,2'-anhydro-l- (B-D-arabinofuranosyl)uracil with azide ion (J DC. 27, 3045, and J. Chem. Soc. 1958, 4242) were unsuccessful. This invention therefore includes not only the indicated compounds but the novel and unobvious procedure for preparing them.

In summary, the compounds of this invention include compounds represented by the formula:

wherein B is a pyrimidine base or a conventional hydrolyzable acyl derivative thereof;

R is hydrogen, an acyl group of an amino acid, an

acyl group of a dipeptide, or a conventional hydrolyzable acyl derivative thereof; and

R and R each is hydrogen or a conventional hydrolyzable acyl group.

The term pyrimidine base as used herein, refers to an unsubstituted or substituted pyrimidine or 6- azapyrimidine group wherein the point of attachment to the furanose unit is through the l-position of the pyrimidine group. More specifically, the pyrimidine bases include uracil-l-yl, cytosin-l-yl, S-bromouracil-l -yl, 5-chlorouracil-l-yl, 5-iodouracil-l-yl, S-fluorouracill-yl, 5 -fluorocytosinl -yl, thyminl -yl, 5- methylcytosin- 1 -yl, S-trifluoromethyluracill -yl, 5- trifluoromethylcytosin-l-yl, S-aminouracil-l-yl, 5- aminocytosinl -yl, S-methylaminouracill -y], 5- dimethylaminouracil-l -yl, S-methylaminocytosinl -yl, S-dimethylaminocytosin-l-yl, 5-hydroxyuracil-l-yl, 6- azauracil-l-yl, 6-azacytosin-l-yl, 6-azathymin-l-yl, and the like.

The terms hydrolyzable esters, hydrolyzable acyloxy groups and hydrolyzable acyl derivatives, as used herein, refer to those esters and acyl derivatives conventionally employed in the nucleoside and nucleotide art, preferably those derived from carboxylic acids having from one to 12 carbon atoms. Typical conventional hydrolyzable acyl groups thus include acetyl, propionyl, butyryl, valeryl, isovaleryl, hexanoyl, heptanoyl, octanoyl, nonanoyl, undecanoyl, lauraloyl, benzoyl, phenyllacetyl, phenylpropionyl, o-, m-, pmethylbenzoyl, B-cyclopentylpropionyl, dihydrocinnamoyl, and the like.

The term amino acids" refer to naturally occurring amino acids such as those obtained from proteins from animal or vegetable sources as well as products having similar structures isolated from microorganisms. Examples of typical amino acids include glycine, the L forms of alanine, valine, leucine, isoleucine, phenylalanine,

5 tyrosine, proline, hydroxyproline, serine, threonine,

cystenine, cystine, methionine, tryptophane, aspartic acid, glutamic acid, arginine, lysine, histidine, B-alanine, a-arninobutyric acid, y-aminobutryic acid, thyroxine, diiodotyrosine, B-thiolvaline, a,-y-diaminobul0 tyric acid, omithine, hydroxylysine, and the like and the D form of valine, leucine, serine, cysteine, phenylalanine, aspartic acid and glutamic acid, for example.

The term dipeptide refers to any of the various conventional dipeptides derived from two of the above 15 amino acids.

The compounds of this invention exhibit antimetabolic properties and are accordingly useful in producing metabolic deficiencies in biological systems. For example, they are useful in inhibiting the growth of several bacteria, such as Shigella dysenteria, Shigella parody, pseudomonas aeruginosa, bacillus subtilis.

Certain compounds of this invention are prepared by a procedure which can be illustrated as follows:

ACO I, 011511,

0 o HN I R3 in IF J z I '7 o 0- HOCH; x HocH g/o o 1 l 1 N) I i OH N. on NH;

(V (VI) 5 In the above illustrated procedure,

R is hydrogen, methyl, fluoro or trifluoromethyl; R is amino, methylamino, or dimethylamino;

R is amino, methylamino, dimethylamino, chloro,

bromo or iodo;

X is chloro, bromo or iodo; and

Z is a methine group or nitrogen.

The compounds of Formula I are known in the art or can be prepared by procedures which are known in the art. For example, uridine or the corresponding S-fluoro or S-methyluridine can be converted to the corresponding 2,2'-anhydro compounds of Formula I by treating them with thiocarbonyldiimidazole in an inert organic solvent such as toluene at reflux for one hour followed by chromatographic purification as described in J. Med. Chem. 9, 101 (1966), or by treatment with diphenylcarbonate and sodium bicarbonate in hot dimethylformamide as described in Biochem. 5, 2076 (1966).

The 2'-azido compounds of Formula II are prepared by treating the compounds of Formula I with sodium or lithium azide in an aprotic solvent such as dimethyl sulfoxide, dimethylformamide, or hexamethylphosphoramide in the presence of benzoic acid or 2,4,6- trimethylbenzoic acid at elevated temperatures, preferably from 140 to 170C for from five minutes to four hours.

The 2'-amino compounds of Formula III are prepared by reducing the compounds of Formula II in the presence of a palladium or Raney-nickel catalyst or with sodium borohydride in a suitable solvent such as methanol or isopropanol.

The S-bromo and 5-chloro compounds of Formula IV are prepared by acylating the 2'-azido compounds of Formula II with acetic anhydride in dimethylformamide in the presence of pyridine, for example, and reacting the acylated product with a corresponding N- bromosuccinimide or N-chlorosuccinimide in a suitable solvent. The 5-iodo compounds of Formula IV are prepared by reacting the acylated product with N- iodosuccinimide in the presence of dibutylsulfide (catalyst) in dimethylsulfoxide (solvent) as described in J.B.C. 238, PC 2249 (1963).

The compounds of Formula VI wherein R is chloro, bromo or iodo are prepared by reducing the 2-azido compounds of Formula IV with sodium borohydride followed, if necessary, by removal of the acyl protecting groups with aqueous ammonium hydroxide.

The compounds of Formula VI wherein R is amino or methyl-amino can be prepared as follows. The 5- bromo compounds of Formula IV are reacted with ammonia', methylamine or dimethylamine at about 80C for 18 hours under pressure to yield the 2-azido compounds of Formula V. The compounds of Formula V are then reduced with palladium-on-charcoal in methanol, for example, to yield the corresponding 2'-amino compounds of Formula VI.

The cytidine, 6-azacytidine and the corresponding S-substituted compounds can be prepared by a procer lllEEEEQ i i qliim In the above formulas,

R is hydrogen, fluoro, methyl, trifluoromethyl,

amino, methylamino, or dimethylamino;

R is hydrogen, fluoro, methyl, trifluoromethyl, acetamido, methylacetamido, or dimethylamino;

R is hydrogen, fluoro, methyl, trifluoromethyl, thioacetamido, methylthioacetamido, or dimethylamino; and

Z is as previously defined.

The compounds of Formula VIII are prepared by reacting the compounds of Formula VII with acetic anhydride in pyridine. The acetylated product is then reacted with phosphorous pentasulfide in pyridine at a temperature of from to 120C, for from one to 20 hours, preferably at the reflex temperature of the solution for from about one to four hours to yield the compounds of Formula IX. By reacting the latter compounds with ammonia in a lower alcohol such as an absolute methanol solution saturated with ammonia at a temperature of from 50 to 120C for from one hour to five days, preferably at about C under pressure for from about eight to 36 hours, the compounds of Formula X are obtained.

The aminoacylamido and dipeptidylamido compounds of this invention can be prepared by a procedure illustrated as follows:

In the above formulas,

B is as previously defined; and

is an acyl group of an amino acid or an acyl group of a dipeptide.

The compounds of Formula XIl are prepared by reacting the compounds of Formula XI with the N- hydroxysuccinimide ester of the respective N- protected amino acid or dipeptide or with the N- hydroxysuccinimide ester of the respective monobenzyl esters of N-protected dicarboxylic amino acids or dipeptides. The reaction is conducted in a solvent such as aqueous ethanol or dimethylforrnamide containing triethylamine for from one to 20 hours at a temperature of from 20 to 50C. The solution is then acidified, and the respective compounds of Formula XII are separated therefrom. The amino protecting group (N-tbutoxycarbonyl, N.-carbobenzyloxy or monomethyoxytrityl) is then removed by treatment with acid or by catalytic hydrogenolysis using a palladium catalyst to give the respective compounds of Formula XII which are purified and isolated by chromatography.

PREPARATION 2,2 '-Anhydrol -(B-D-arabinofuranosyl )-5 -fluorouracil S-Fluorouridine (1.4 g.) is suspended in 50 ml. of dry toluene, l g. of thiocarbonyldiimidazole is added. The reaction mixture is refluxed for one hour, chilled, and extracted three times with water. The aqueous phase is treated with carbon and evaporated to dryness, leaving a solid residue which is purified by preparative thin layer chromatography giving 2,2'-anhydro-l-(B-D- arabinofuranosyl)-5-fluorouracil.

This invention is further illustrated by the following specific but non-limiting examples.

EXAMPLE 1 2 '-Azido-2 '-deoxyuridine A solution of 2,2 '-anhydrol B-D- arabinofuranosyl)-uracil (4.5 g., 20 mmoles), lithium azide (7 g., 143 mmoles) and 2,4,6-trimethylbenzoic acid (3.6 g., 22 mmoles) or benzoic acid (2.7 g., 22 mmoles) in 50 ml. of dimethyl sulfoxide is kept at 150C for 90 minutes. After cooling, the reaction mixture is poured into one liter of ether with vigorous agitation to yield a brown syrup which is separated from the ether layer. The syrup is dissolved in 500 ml. of methanol, and 140 ml. of ion-exchange resin (Dowex 50 H form) is added. After stirring for 30 minutes, the ion-exchange resin is removed by filtration, and the filtrate is evaporated to dryness under vacuum. The residue is dissolved in a small amount of methanol and applied to several preparative thin layer chromatography plates (silica gel HF, 1.3 mm. thick, 0.2 X l m.). After elution with a mixture of ethyl acetate and acetone (1:1), the major UV absorbing band is eluted with methanol to yield 2-azido-2'-deoxyuridine.

EXAMPLE 2 2'-Azido-2'-deoxy-5-fluorouridine To a solution of 2,2 '-anhydrol B-D- arabinofuranosyl)-5-fluorouracil (12.2 g.), benzoic acid (6.7 g.) in 160 ml. of hexamethylphosphoramide is added lithium azide (17.5 g.). The suspension is heated in a 160C bath for 20 minutes. After cooling the reaction mixture, 500 ml. of water is added, and the mixture is extracted with 250 ml. of chloroform. The chloroform layer is carefully back extracted with water, and the water extracts are evaporated to dryness, dissolved with a mixture of methanol in acetone (1:9), filtered, and evaporated to dryness. The residue is dissolved in acetone containing a minimum amount of methanol (to achieve complete solution) and passed through a short column of silica gel. Eluting the column with acetone yields 2'-azido-2'-deoxy-5-fluorouridine.

EXAMPLE 3 Other 2'-azido-2'-deoxyuridines and 2-azido-2'-deoxy-6-azauridines Repeating the procedure of Example 1 but replacing 2 ,2'-anhydro-l-(B-D-arabinofuranosyl)-uracil with 2 ,2-anhydro-l -(B-D-arabinofuranosyl )-6-azauracil 2 ,2 -anhydrol -(B-D-arabinofuranosyl )-5 methyluracil,

2 ,2 '-anhydro-1-(B-D-arabinofuranosyl)-6-aza-5 methyluracil,

2 ,2'-anhydrol -(B-D-arabinofuranosyl )-6-aza-5 fluorouracil,

2 ,2'-anhydro- 1 -(]3-D-arabinofuranosyl )-5- EXAMPLE 4 2'-Amino-2 '-deoxyuridine EXAMPLE 5 Other 2'-amino-2'-deoxyuridines and 2-amino-2'-deoxy-6-azauridines Repeating the procedure of Example 4 with the products of Examples 2 and 3 yields the corresponding 2'-amino-2'-deoxy-5-fluorouridine, 2'-amino-2'-deoxy-6-azauridine, 2-amino-2'-deoxy-5-methyluridine, 2'-amino-2-deoxy-6-aza-5-methyluridine, 2'-amino-2'-deoxy-6-aza-5-fluorouridine, 2-amino-2-deoxy-5-trifluoromethyluridine, and 2-amino-2-deoxy-6-aza-5-trifluoromethyluridine.

EXAMPLE 6 3',5'-Di-O-acetyl-2'-azido-2'-deoxyuridine and 6-azauridine To a solution of 2'-azido-2'-deoxyuridine (800 mg.) in dimethylfonnamide (30 ml.) is added acetic anhydride (6 ml.) and pyridine (3 ml.). The reaction mixture is left at room temperature for 18 hours, and evaporated to dryness under vacuum. The resulting syrup is partitioned between water and ethyl acetate. The organic layer is dried over magnesium sulfate and evaporated to dryness, giving a syrup which is purified by preparative thin layer chromatography using ether-ethyl 7 acetate (lzl) as eluant to yield 3.,5-di-O-acetyl-2'- azido-2'-deoxyuridine.

Repeating the above procedure with 2'-azido-2'- deoxy-fi-aza-uridine yields 3,5-di-O-acetyl-2'-azido- 2'-deoxy-6-azauridine.

EXAMPLE 7 3',5'-Di-O-acetyl-2'azido-2'-deoxy-Sbromouridine and corresponding 6-azauridine EXAMPLE 8 3',5'-Di-O-acetyl-2-azido-2'-deoxy-5-chlorouridine and the corresponding -azauridine Repeating the procedure of Example 7 but replacing N-bromo-succinimide with N-chlorosuccinimide yields the corresponding 3 ,5 '-di-O-acetyl-2'-azido-2'-deoxy- -chlorouridine and 3 ,5 '-di-O-acetyl-2 '-azido-2 deoxy-6-aza-5-chlorouridine.

EXAMPLE 9 3 ',5-Di-O-acetyl 2'-azido-2-deoxy-5 -iodouridine and the corresponding 6-azauridine To a solution of 3',5'-di-O-acetyl-2-azid o-2'- deoxyuridine (35 mg.) in dimethyl sulfoxide (2 ml.) containing 5 microliters of di-N-butyldisulfide is added with stirring a solution of N-iodosuccinimide (90 mg.)

in 1 ml. of dimethyl sulfoxide. The reaction is left at room temperature for 3 days and then partitioned between chloroform and water. The chloroform layer is washed with an aqueous solution of sodium thiosulfate and with water, dried over magnesium sulfate and evaporated to dryness. The chloroform extracts yield a syrup which is purified by preparative thin layer chromatography, eluting with a mixture of chloroform and acetone to yield 3',5'-di-0-acetyl-2'-azido-2'-deoxy-5- iodouridine.

Repeating the above procedure with 3',5'-di-O- acetyl-2-azido-2'-deoxy-6-azauridine yields the corresponding 3 ',5 '-di-O-acetyl-2'-azido-2'-deoxy-5-iodo-6- azauridine.

EXAMPLE l0 2-Amino-2-Deoxy-5-bromouridine and fi-Azauridine Compounds To a solution of 3,5-di-O-acetyl-2-azido-2'-deoxy- S-bromouridine (30 mg.) in 3 ml. of isopropanol is added 20 mg. of sodium borohydride. The suspension is heated under reflux for three days and evaporated to dryness. The residue is mixed with water, and neutralized with glacial acetic acid to a pH of 6. The solution is then evaporated to dryness, coevaporated several times with methanol, dissolved in 1 ml. of water and absorbed on a small column of Dowex 50 H resin. The

column is rinsed with water until no UV absorbing material is eluted, and then eluted with l N ammonium hydroxide. The UV absorbing material is pooled and evaporated to dryness to yield a mixture of 2'-amino- 2'-deoxyuridine and 2'-amino-2-deoxy-5- bromouridine which is separated by preparative thin layer chromatography using acetone as an eluant to give pure 2'-amino-2'-deoxy-5-bromouridine.

Repeating the above procedure with the other products of Examples 7, 8 and 9 yields the corresponding 2'-amino2'-deoxy-6-aza-5-bromouridine, 2'-amino-2'deoxy-S-chlorouridine, 2'-amino-2'-deoxy-6-aza-5-chlorouridine, 2-amino-2-deoxy-5-iodouridine, and 2' amino-2'-deoxy-6-az.a-5-iodouridine.

EXAMPLE ll 2'-Azido-2' -Deoxy-5-Aminouridine and 6-Azauridine A mixture of 2'-azido-2-deoxy-5-iodouridine (l mmole) and dry liquid ammonia (25 ml.) is heated in a stainless steel container at C for 18 hours. Afer removal of the ammonia, the pH of an aqueous solution of the product is adjusted to 2 with concentrated hydrochloric acid, and the solution is passed through a column of Dowex 50 H ion-exchange resin. The column is washed wtih water to remove unreacted material. The S-amino derivative is eluted with l N ammonium hydroxide until no UV absorbing product is eluted. The UV absorbing fraction is evaporated to dryness to yield 2'-azido-2-deoxy-5-aminouridine.

Repeating the above procedure with 2'-azido-2'- deoxy-G-aza-S-iodouridine yields the corresponding 2'- azido-2'-deoxy-5-amino-6-azauridine.

EXAMPLE l2 2'-Azido-2'-Deoxy-5-Methylaminouridine, 2'-Azido-2'-Deoxy5Dimethylaminouridine and the Corresponding fi-Azauridine Compounds Repeating the procedure of Example 11 but replacing dry liquid ammonia with 25 ml. of dry methylamine yields the corresponding 2'-azido-2'-deoxy-5- methylaminouridine and 2'-azido-2'-deoxy-6-aza-5- methylaminouridine.

Repeating the procedure of Example 11 but replacing the liquid ammonia with 18 ml. of dry dimethylamine yields the corresponding 2'-azido-2-deoxy-5- dimethylaminouridine and 2-azido-2-deoxy-6-a2a-5- dimethylaminouridine.

EXAMPLE l3 2'-Amino-2'-Deoxy-5-Aminouridine and the Corresponding -Azauridine A solution of 2-azido-2'-deoxy-5-aminouridine (5 g.) in l00 ml. of methyl is hydrogenated in the presence of a palladium-on-carbon catalyst (10 percent) under one atmosphere of hydrogen for 2 hours at room tem perature. The catalyst is filtered from the mixture over celite and carefully rinsed with methanol. The filtrate is evaporated to dryness to yield 2'-amino-2' deoxy-5- aminouridine.

Repeating the procedure with 2'-azido-2'-deoxy-5- amino-G-azauridine yields the corresponding 2'-amino- 2'-deoxy-5-a.mino-6-azauridine.

I EXAMPLE l4 2l'-Amino-2'-Deoxy-5-Methylaminouridine, 2-Amino-2-Deoxy-5-Dimethylaminouridine and the Corresponding 6-Aza Compounds Repeating the procedure of Example 13 with the products of Example 12 yields the corresponding 2'- amino-2-deoxy-5-methyl-aminouridine, 2'-amino-2'- deoxy-6-aza-5 -methylaminouridine, 2 '-arnino-2 deoxy-S -climethylaminouridine, and 2 -a.mino-2'- deoxy-6-aza-5-dimethylaminouridine.

EXAMPLE l 2-Amino-2-Deoxycytidine and 2 '-Amino-2 -Deoxy-6-Azacytidine To a solution of 2-amino-2'-deoxyuridine (243 mg., 1 mmole) in 5 ml. of acetic anhydride is added I ml. of pyridine. The reaction mixture is left at room temperature overnight. Then methanol is added to destroy the excess ov acetic anhydride, and the solvents are evaporated under reduced pressure. The resulting syrup is partitioned between water and chloroform. The chloroform extracts are dried over magnesium sulfate, filtered and evaporated to dryness. The residue is crystallized from acetonehexane to yield 2-acetamido-3,5-di-O- acetyl-2'-deoxyuridine.

A solution of this compound (369 mg., l mmole) and phosphorus pentasulfide (444 mg., 2 mmole) in 30 ml. of dry pyridine is heated at reflux temperature for 2.5 hours. The reaction mixture is cooled and evaporated to dryness. The resulting syrup is dissolved in chloroform. The chloroform solution is extracted with water, 0.2 N sulfuric acid and finally water. The chloroform layer is dried over magnesium sulfate, filtered and evaporated to dryness. The residue is purified by preparative thin layer chromatography, and the main UV band is eluted with methanol to yield l-(2- thioacetamido-3 ',5 '-di-Oacetyl-2 -deoxy-B-D- ribofuranosyl)-4-thiouracil.

A solution of this compound in 50 ml. of absolute methanol saturated with ammonia is heated for 18 hours at 95C in a steel container. After cooling the reaction mixture, the solvent is evaporated to dryness under reduced pressure. The residue is dissolved in water and treated with ion-exchange resin (Dowex AG-l 0H form). The resin is filtered and washed with water. The filtrate is evaporated to dryness, and the residue is crystallized from methanol to yield 2-amino-2'- deoxycytidine.

Repeating the above procedure but replacing 2'-amino-2'-deoxyuridine with 2'-amino-2'-deoxy-6- azauridine yields the corresponding 2'-amino-2'- deoxy--azacytidine.

EXAMPLE 16 Other 2'-Amino-2'-Deoxycytidines and o-Azacytidines Repeating the procedure of Example but replacing 2'-amino-2-deoxyuridine with 2-arnino-2-deoxy-5-methyluridine, 2'-amino-2'-deoxy-6-aza-5-methyluridine, 2-amino-2-deoxy-5-trifluoromethyluridine, 2'-amino-2'-deoxy-6-aza-5-trifluoromethyluridine, 2'-amino-2'-deoxy-5-aminouridine, 2'-arnino-2'-deoxy-5-amino-6-azauridine, 2-amino-2'-deoxy-5-methylaminouridine, 2-amino-2'-deoxy-6-aza-5-methylaminouridine, 2'-amino-2'-de0xy-5-dimethylaminouridine, and

2-amino-2'-deoxy-5-dimethylamino--azauridine yields the corresponding 2'-amino-2-deoxy-5-methylcytidine, 2-amino-2'-deoxy-6-aza-5-methylcytidine, 2'-amino-2'-deoxy-5-trifluoromethylcytidine, 2-amino-2'-deoxy-6-aza-S-trifluoromethylcytidine, 2'-amino-2'-deoxy-5-aminocytidine, 2'-amino-2'-deoxy-5-amino-6-azacytidine, 2'-amino2-deoxy-5-methylaminocytidine, 2-amino-2'-deoxy-6-aza-5-methyla.minocytidine, 2-amino-2'-deoxy-5-dimethylaminocytidine, and 2'-amino-2'-deoxy-6-aza-5-dimethylaminocytidine.

EXAMPLE l7 2'-DEOXY-2'-GLYCYLAMIDOURIDINE A solution of 2-amino-2 dexoyuridine (243 mg, 1 mmole) and the N-hydroxysuccinimide ester of N-(monomethoxytrityl)glycine (444 mg., l mmole) described in Biochem. Biophys. Acta. 138, 241 (1967) in 5 ml. of dimethyl formamide containing 0.15 ml. (l mmole) of triethylamine is left at room temperature for 24 hours. Then 2 ml. of 2 N hydrochloric acid is slowly added with magnetic stirring of the mixture, and the reaction mixture is left at room temperature for 30 minutes. The excess acid is neutralized by adding solid sodium bicarbonate. The solvents are then evaporated to dryness under vacuum, and the residue is mixed with methanol, and purified by preparative thin layer chromatography, the main UV band yielding 2'-deoxy-2- glycyl-amidouridine.

EXAMPLE l8 2'-Deoxy-2-L-a.lanylamidouridine A mixture of 486 mg. of 2-amin0-2-deoxyuridine, 774 mg. of the N-hydroxysuccinimide ester of N-t-butoxycarbonyl-L-alanine (prepared by the method of Anderson et al. J.A.C.S. 86, 1839 (1964)) and 168 mg. of sodium bicarbonate is stirred in 25 ml. of aqueous ethanol for l8 hours. The solvent is evaporated, and the residue partitioned between ethyl acetate and water. The organic phase is evaporated, and the t-butoxy carbonyl group is removed by treatment with trifluoroacetic acid at room temperture for 1 hour. The resulting 2-deoxy-2'-L-alanylamidouridine is purified by preparative thin layer chromatography.

EXAMPLE 19 Other l-(2-L-Alanylamido-2-Deoxy-B-D-' Ribofuranosyl)Pyrimidines and fi-Azapyrimidines Repeating the procedure of Example 18 with the products of Examples 5, l0, l3, l4, l5 and 16 yields the corresponding 1-(Z-L-aJanylamido-Z-deoxy-B-D- ribofuranosyl)pyrimidines wherein the pyrimidine grou is, respectively, S-fluorouracil, fi-azauracil, thymine, 6 azathymine, 6-aza-5-fluorouracil, S-trifluoromethyluracil, 6-aza-5-trifluoromethyluracil, 5- bromouracil, 6-aza-5-bromouracil, S-chlorouracil, 6- aza-S-chlorouracil, S-iodouracil, 6-aza-5-iodouracil, 5- aminouracil, S-amino--azauracil, 5- methylaminouracil, 6-aza-5-methylaminouracil, 5- dimethylaminouracil, 6-aza-5-dimethylaminouracil, cytosine, fi-azacytosine, 5-methylcytosine, 6-a2a-5- methylcytosine, S-trifluoromethylcytosine, 6-aza-5-trifluoromethylcytosine, S-aminocytosine, 5-amino-6- azacytosine, S-methylaminocytosine, 6-a1a-5- methylaminocytosine, S-dimethylaminocytosine, and 6-aza-5-dimethylaminocytosine.

EXAMPLE 20 Other 2L?N-(Aminoacylamido)-2-Deoxyuridines Repeating the procedure of Example 18 with N- hydroxysuccinimide esters of other N-(tbutoxycarbonyl)amino acids such as glycine, D- alanine, L-valine, L-leucine, L-isoleucine, L- phenylalanine, D-phenylalanine, L-tyrosine, L-proline, L-hydroxyproline, L-serine, L-threonine, L-cysteine, L-methionine, Ltryptophane, L-lysine, and L-histidine (prepared by the method of Anderson et al. J.A.C.S. 86, 1839 (1964)) yields the corresponding 2'-deoxy2'-glycylamidouridine,

2'-D-alanylamido-2-deoxyuridine, 2-deoxy-2'-L-valylamidouridine, 2'-deoxy-2'-L-leucylamidouridine, 2'-deoxy-2'-L-isoleucylamidouridine, 2-deoxy-2'-L-phenylalanylamidouridine, 2'-deoxy-2'-D-phenylalanylamidouridine, 2-deoxy-2'-L-tryosylamidouridine, 2-deoxy-2'-L-prolylamidouridine, 2'-deoxy-2"L-hydroxyprolylamidouridine, 2'-deoxy-2'-L-serylamidouridine, 2'-deoxy-2'-L-threonylamidouridine, 2'-L-cysteinylamido-2'-deoxyuridine, 2-deoxy-2'-L-methionylamidouridine, 2'-deoxy-2'-L-tryptophylamidouridine, 2'-deoxy-2-L-lysylamidouridine, and 2'-deoxy-2'-L-histidylamidouridine.

Repeating the above procedure with N- hydroxysuccinimide esters of N- benzoxycarbonylamino acids such as L-glutamic-ybenzyl ester, L-asparatic-,6benzyl ester, and nitro-L- arginine, and hydrogenating the product with palladium-on-carbon in methanol at room temperature for six hours at one temperature of hydrogen, filtering the reaction mixture, evaporating the filtrate to dryness, and purifying the product by ion exchange chromatography yields 2-deoxy-2'-L-glutamylamidouridine, 2'-L- aspartylamido-Z'-deoxyuridine, and 2'-L- arginylamido-2'-deoxyuridine, respectively.

The N-hydroxysuccinimide ester of 'y-benzyl-N- carbobenzoxy-L-glutamic acid is prepared as follows. N,N-dicyclohexylcarbodiimide (0.1 mM.) is added to a solution of 'y-benzyl-Ncarbobenzoxy-L-glutamic acid (0.1 mM) and hydroxysuccinimide (0.1 mM) in 250 ml. of dioxane with cooling. The reaction mixture is left at C for 24 hours. The dicyclohexylurea formed is filtered from the mixture and washed with dioxane. The filtrate is evaporated to dryness in vacuo to yield a solid which is purified by chromatography to yield the N- hydroxysuccinimide ester of 'y-benzyl-N-carbobenzoxy-L-glutamic acid. Repeating this procedure with B-benzyl-N-carbobenzoxy-L-aspartic acid and N- carbobenzoxynitro-L-arginine yields the corresponding N-hydroxysuccinimide esters.

EXAMPLE 2] l-( 2-[Aminoacylamido1-2'-Deoxy-B-D- Ribofuranosyl)-Pyrimidines and 6-Azapyrimidines Repeating the procedures of Example 20 but replacing 2'-amino-2-deoxyuridine with the products of Examples S, l0, l3, l4, l and 16 yields the corresponding I-(Z-[aminoacylamido 1-2 '-deoxy-B-D- ribofuranosyl)pyrimidines and 1-(2- [aminoacylamido1-2 '-deoxy- -D-ribofuranosyl )-6- azapyrimidines wherein the amino acid acyl groups are glycyl, L-alanyl, D-alanyl, L-valyl, L-leucyl, l..- isoleucyl, L-phenylalanyl, D-phenylalanyl, L-tyrosyl, L- prolyl, L-hydroxyprolyl, L-seryl, L-threonyl, L- cysteinyl, L-rnethionyl, L-tryptophyl, L-aspartyl, L- glutamyl acid, L-arginyl, L-lysyl and L-histidyl groups, and the pyrimidines include S-fluorouracil, 6-azauracil, thymine, 6-azathymine, 6-aza-5-fluoro-uracil, 5- trifluoromethyluracil, 6-aza-5-trifluoromethyluracil, 5- bromouracil, 6-aza-5-bromouracil, S-chlorouracil, 6- aza-5-chlorouracil, S-iodouracil, 6-aza-S-iodouracil, 5- aminouracil, 6-aza-S-aminouracil, 5- methylaminouracil, 6-aza-5-methylaminouracil, 5- dimethylaminouracil, 6-aza-5-dimethylaminouracil, 6- azacytosine, S-methylcytosine, 6-aza-5-methylcytosine, S-trifluoromethylcytosine, 6-aza-5-trifluoromethylcytosine, S-aminocytosine, 6-aza-5-aminocytosine, 5- methylaminocytosine, 6-aza-5-methylaminocytosine, S-dirnethylaminocytosine and 6-aza-5- dimethylaminocytosine groups.

EXAMPLE 22 l -(2'-Deoxy-2-Dipeptidylamidouridines Repeating the procedure of Example 18 but replacing the N hydroxysuccinimide ester of N-t-butoxycarbonyl-L-alanine with N- hydroxysuccinimide esters of N-t-butoxycarbonyldipeptides wherein the dipeptides are formed from two of the same or different amino acids such as glycine, L- alanine, D-alanine, L-valine, L-leucine, L-isoleucine, L-phenylalanine, D-phenylalanine, L-L-tyrosine, L- proline, L-hydroxyproline, L-serine, L-threonine, L- cysteine, L-methionine, L-tryptophane, L-lysine, and L-histidine or N-hydroxysuccinimide esters of N- benzoxycarbonylamino acids such as L-glutamic--ybenzyl ester, L-aspartic-B-benzyl ester, and nitro-L- arginine (followed by hydrogenation with palladiumon-carbon in methanol as described in Example 20 for dipeptides containing the latter three groups) yields the corresponding 2'-deoxy-2' dipeptidylamidouridines.

EXAMPLE 23 Other 1 -(2 '-Deoxy-2 '-DipeptidylamidoflD-Ribofuranosyl Pyrimidines Repeating the procedure of Example 22 with the products of Examples 5, l0, l3, l4, l5 and 16 yields the corresponding l-(2'-deoxy-2'-dipeptidylamido-B- D-ribofuranosyl)-pyrirnidines wherein the pyrimidines include S-fluorouracil, fi-azauracil, thymine, 6- azathymine, 6-aza-5-fluorouracil, 5- trifluorornethyluracil, 6-aza-5-trifluoromethyluracil, S- bromouracil, 6-aza-5-bromouracil, S-chlorouracil, 6- aza-S-chlorouracil, S-iodouracil, 6-aza-5-iodouracil, 5- aminouracil, 6-aza-5-aminouracil, 5- methylaminouracil, 6-aza-5-methylaminouracil, 5- dimethylaminouracil, 6-aza-5-dimethylaminouracil, cytosine, fi-azacytosine, S-methylcytosine, 6-aza-5- methylcytosine, S-trifluoromethylcytosine, 6-aza-5-trifluoromethylcytosine, S-aminocytosine, 6-aza-5- aminocytosine, S-methylaminocytosine, 6-aza-5- methylaminocytosine, Sdimethylaminocytosine and 6 aza-S-dimethylaminocytosine.

We claim:

OR NHR wherein B is a pyrimidine base or a hydrolyzable acyl derivative thereof derived from a carboxylic acid having from one to 12 carbon atoms;

R is hydrogen, an acyl group of an amino acid, an acyl group of a dipeptide, or a hydrolyzable acyl derivative of an acyl group of an amino acid or an acyl group of a dipeptide, said acyl groups being derived from a carboxylic acid having from one to 12 carbon atoms and R and R each is hydrogen or a conventional hydrolyzable acyl group derived from a carboxylic acid having from one to 12 carbon atoms.

2. A compound of claim 1 wherein R, R and R each is hydrogen.

3. A compound of claim 2 wherein B is uracil-l-yl,

cytosin-l-yl, S-bromouracil-l-yl, -chlorouracil-l-yl, 5-iodouracil-1-yl, S-fluorouracil-l-yl, thymin-l-yl, 5-

methylcytosin-l-yl, S-trifluoromethyluracil- I -yl, 5- trifluoromethylcytosinl -yl, 5 -aminouracil- 1 -yl, 5 aminocytosin-l-yl, S-methylaminouracil-l-yl, 5-

methylaminocytosin- 1 -yl, S-dimethylaminouracil- 1 -yl, S-dimethylaminocytosin-l-yl, S-hydroxyuracil-l-yl, or

a 6 aza counterpart radical thereof.

4. As a compound of claim 3, 2-amino-2- deoxyuridine.

5. As a compound of claim 3, 2-amino-2'-deoxy-5- bromouridine.

6. As a compound of claim 3, 2'-amino-2'-deoxy-5- chlorouridine.

7. As a compound of claim 3, 2'-amino-2-deoxy-5- iodouridine.

8. As a compound of claim 3, 2'-amino-2'-deoxy-5- fluorouridine.

9. As a compound of claim 3, 2-amino-2'-deoxy-5 aminouridine.

10. As a compound of claim 3, 2'-amino-2'-deoxy-5- methylaminouridine.

1 1. As a compound of claim 3, 2-amino-2-deoxy-5- dimethylaminouridine.

12. As a compound of claim 3, 2'-amino-2- deoxycytidine.

13. A compound of claim 1 wherein R is an acyl group of an amino acid or a dipeptide, and R and R each is hydrogen.

14. A compound of claim 13 wherein R is an acyl group of an amino acid.

15. As a compound of claim 14, 2'-deoxy-2'- glycylamidouridine.

16. As a compound of claim 14, 2'deoxy-2'-L- alanylamidouridine.

17. As a compound of claim 14, 2'-deoxy-2'-L- lysylamidouridine.

18. As a compound of claim 14, 2'-deoxy-2'-L- arginylamidouridine.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION V A Patent No. 3,755,295 Dated August 28, 1973 Inventor-(s) Ju1 1'en P Verheyden gdohn G. Moffatt It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 8, hne 12, "Z'deoxy" should read --2'-deoxy-.

Column 10, Hne 55, "grou" shou1d read --group-.

Co1umn H line 39, "temperature" shou1d read --atmosphere-.

Co1umn 12, 11'ne 16 after "6-aza-5-dimethy1aminouracfl insert --cytos1'ne,--; line 47, "DipeptidylamidoBD should read e-Dipeptidy1am1'do-s-D Co1umn 13,, 11'ne 16, "acyl" (second occurrence) shou1d be de1eted; and line 21, "conventional should be deleted.

Signed and sealed this 22nd day of January 197M.

(SEAL) Attest:

EDWARD M. FLETCHER,JR. RENE'D. TEGTI LEIYER Attesting Officer Acting Commissioner of Patents 

2. A compound of Claim 1 wherein R1, R2 and R3 each is hydrogen.
 3. A compound of claim 2 wherein B is uracil-1-yl, cytosin-1-yl, 5-bromouracil-1-yl, 5-chlorouracil-1-yl, 5-iodouracil-1-yl, 5-fluorouracil-1-yl, thymin-1-yl, 5-methylcytosin-1-yl, 5-trifluoromethyluracil-1-yl, 5-trifluoromethylcytosin-1-yl, 5-aminouracil-1-yl, 5-aminocytosin-1-yl, 5-methylaminouracil-1-yl, 5-methylaminocytosin-1-yl, 5-dimethylaminouracil-1-yl, 5-dimethylaminocytosin-1-yl, 5-hydroxyuracil-1-yl, or a 6 aza counterpart radical thereof.
 4. As a compound of claim 3, 2''-amino-2''-deoxyuridine.
 5. As a compound of claim 3, 2''-amino-2''-deoxy-5-bromouridine.
 6. As a compound of claim 3, 2''-amino-2''-deoxy-5-chlorouridine.
 7. As a compound of claim 3, 2''-amino-2''-deoxy-5-iodouridine.
 8. As a compound of claim 3, 2''-amino-2''-deoxy-5-fluorouridine.
 9. As a compound of claim 3, 2''-amino-2''-deoxy-5-aminouridine.
 10. As a compound of claim 3, 2''-amino-2''-deoxy-5-methylaminouridine.
 11. As a compound of claim 3, 2''-amino-2''-deoxy-5-dimethylaminouridine.
 12. As a compound of claim 3, 2''-amino-2''-deoxycytidine.
 13. A compound of claim 1 wherein R1 is an acyl group of an amino acid or a dipeptide, and R2 and R3 each is hydrogen.
 14. A compound of claim 13 wherein R1 is an acyl group of an amino acid.
 15. As a compound of claim 14, 2''-deoxy-2''-glycylamidouridine.
 16. As a compound of claim 14, 2''-deoxy-2''-L-alanylamidouridine.
 17. As a compound of claim 14, 2''-deoxy-2''-L-lysylamidouridine.
 18. As a compound of claim 14, 2''-deoxy-2''-L-arginylamidouridine. 